The Egyptian bourse fell to a record low of 12,934 points on Monday, amid selling pressure on Arab and foreign institutions, while Qatar topped the Arab markets.
Egypt's main index fell 1.6%, with Commercial International Bank (CIB), Egypt's largest lender, down 4.4%.
The bank - with the largest relative weight in the market - continued its decline last week following the tax adjustments, to fall during the day to the lowest level in two years. Global Telecom fell 5.7%.
Egyptian investors were net buyers at EGP 444.3 million, while foreigners and Arabs were net sellers at EGP 274.6 million and EGP 169.7 million respectively.
The market capitalization closed at 735.38 billion pounds (41 billion dollars) to lose about nine billion pounds, according to a live website.
The Egyptian stock market ended the trading session on Sunday, the decline in the pressure of sales of Arab and foreign investors.
Arab stocks rose five bourses at the end of trading Monday, taking advantage of strong gains in world oil prices.
The Qatar Exchange was the top gainer with its benchmark index up 1.3% to 10,451 points, boosted by gains in banks, led by Qatar National Bank (QNB) after surging 1.8% to its highest level since listing.